At present, there is no clear production specification for the production standard of the bridge type filter pipe. The use situation and place of use in different regions are different, and the processed things are also different. Each manufacturer has its own set of production system and standard. Xinyou metal has two production processes, one is spiral production, the other is straight seam welding, Compared with the straight seam, the spiral is more beautiful in appearance. The straightness and parallel welding of the pipe are better. The welding and parallel of the straight seam are not as good as the spiral. However, the function is the same. The price of the straight seam is lower than that of the straight seam. The production capacity of the spiral is high. It is recommended to use the spiral bridge filter pipe for mass production.